Combined type-writing and computing machine.



H. HANSON.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLLCATKON men APR-9,2915.

ISHEETS-SHEET I flllll llll Patelilted Sept. 24, 1918/ HANSON..

\ cumameu TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9. I915.

Patented Sept. 24,1918.

ISH'EETS-SHEET 2.

INVENTOR M ATTQRNE? hnnnu WITNESSES:

H. HANSQNV COMBINED TYPE WBITINQ A'ND COMFUHNG-MACHINE.

APPLICATION FILED APR. 9. HHS. V Patented Sept. 24,19l&

ISHEETS-SHEET 3.

WITNESSES: mv emom W BY @4/ I e I ATTO NEY.

' H. HANSON. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED'APR. 9.1M!

' PatentedSept. 24,1918.

Z8HEETS-SHEEY 4,

INVENTOR;

ATTOR EY COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED APR. 9.

1 s i 5. l

Patented Sept. 24, 1918. f

I SHEETSSHEET 5.

A H. HANSONi 4 COMBINEDTYPE WRITING AND COMPUTING MACHINt.

I nrryncmou men APR. 9.19%; 1,279,863. Patentedsept. 24,191&

I SHEETS-8IIEET G.

NORMAL Pas/110w ATTO NEY- H. HANSON. COMBINED TYPE WRITING ANDCOMPUTING, MACHINE.

I I APPLICATIQN FILED APLS. I9I5 Patentd Sept. 24,1918.

TSHEETS-SHEET I.

v number hasberfcqmpletely, set up, general numbers thl1$f$8i3 up intothq cqmputingxwhels; The

combined typewriting and computing'ma- 4's ihflqo ri'esponding pin: onanyrack bar which PATENT-OFFICEQ ma HANSON, or marrow), connmmcv'r,Asammm, BY ninsim assiemms,

mo rmmmwoon comrumma MACHINE comm, 01mm from m x, 4 0002126 M'I'ION OIE'NEW YORK.

cdmsnnm mYP -wmmfim Ami cipnimimgimgcnmim Y To allwhom it may apnea/m Beit known, that I, H ya iding in. Hartof Connecticut, having inventedcertain new anduuseful Improvgnmnts in Combined T :VVritihg andComputing Magihines oi .cor nput ng wheelsa m broughbiinih. mesh, 7

winch thefol lowing is aspe-cificatibn.

- 3 My invention relates 'to computing: na- 10 ,c hines a nd is hegeingii s closed in large part is" an lmprovement on n'iy Patent, No.005,431, dated December 1, 1908. Said pat" ent discloses a combinedtypmvriting and Computi' inachinefwhei ein. the numeral 15 e keysfgfiypewritr se't up on womputatiop; membem equivalentsofpnumbe rs to becarried itdcomplitingwheels, said commit-i ir giwheel gi i orn ling atotalizer 0r cpl-11pm n "20 v shown is p the.usl1a1 Underwood type; and"the carriiaga offth typewriter as heuci.-- n and iaten t the typq'wrting machma imlon'g s elects pins mpresenting the typewriter apeopeimitor is Mtuated 'to carry the chine of said'patent is provided withatrqhS- pqsition devise whereby numbers, as prmt ed ori the worksheetcarried by the platen (of the typewrlter which travels to the 16ft,

i so;

machine may i lij'btra'ct For this purpose each ofti1e1$0mmay'bereglstemd on the prdper cmnputing wheels beginhing at theleft.

*For setting the. pins on the rack bars thgre is providedwseriekaofsetting bars-0r link-- verse row of pms of corresponding values.Thdconnectiuh i5 such that whenever :a numqmikey I ting bar, whidh is,mounted on bellncravnk ai'r n s, isjSwung intd a deprwsed osition, midinsofiwingingibwill strike an depress has beerifiseiectedby theltypewliter carriage, to accord withffhe denominntlonal whgmn being Writmn j'ihon the wQrk-sheet.

Acbrding to the present invention the be adapted to either add. or

' putatiomorrack bars rimybe fonnediwith ants in one directionfbtaddition is operated, the 'wrlsponding set ever Lhq typewriting mgw hinereaqhe two mekstlmwon, one fdniddibion mind i 01. subtraction, and thamputi'n 11991 5 may be normally 110141019341 0f Qai -1 ack-lliflrs Timnmchine is infer-ably snja nged um normally when t e general gpg'mtbr isflaw: atedgthe addftion mcks ofthn m1; mid

zThel computing he- &. i-whilel nun.

ufljOIl'l the computation i si fiicie'nt to cm sw: one cumputing w'helg-w directlyope-13mg another, On; theflrettlrri stroke of thugenetaloperatorlizh rmckvbamj "are earned batik 1hr) ,lbeifjj normal ii whimejnine apa 'ryflver subtracting 0n I Any compufihg z eroto the sight011 I set a, canry bi er x'nm'nber, 21nd saidcar'ry-dver member maygive. the. adjacent computing wheel of next highmi' tieriomina titinonqllnnltm 1 of a revolution 0n the return strokedoi the; gm'mra]operator. Said awry-over devices, 00 which thush re setymmyi d arrangedto -opngiim tlheother dirggztibnfOfshbtmcstiom (f; 1 The;,typewritelflcarriaga selects the rackj i above; b 3% In rack bar' theieon. 1"

A. dog mmmmd, likeyfihe denm'ninatiqp Mating (it)- s 'maly beutiliztridhto unborn sally set, tiwniechaniieml. tp s lli liilfahdetermined 00111111 Tbbxjfinga lwg li Quit the subtiahtim(iiigmrJiUqieSY subtracting ley'e; which controls" ,lng ofjthe hassl ng{my my theusual subtraction'bar and is cammed by \Y the denominationselecting casingor frame similar to the denomination selecting levers.

In order, however, to prevent the machine from being left at subtractionaccidentally, a connection may be provided from the general operatorwhereby the operation of said general operator will release thesubtraction bar and return the mechanism to adding position. l v I Animportant feature of this invention is theprevention when desired of thereturn from of the error-correeti-ngt mechanism. The

a' subtraction at the actuation in, error-correctingnihchamg'lilactuatee by unup tip the time of error. mec anism o'perat*release sleek-norm y'lhold 9:

eral operator also actuates mechanism to return to addin ing mechanismafter the num ris run'up "ifinto the computing {intotglay manually,

traction setting mechanism has been brought the restoration to addingactuation of the error eorrectin mechanism may be prevented by a specielock. 'When thesubtraction. setting mechatale error-correctingnism-hasbeen brwbu ht into play automaticall),- the spring o theautomatic mechanismis strong enough'to oppose the action of the spring fthe subtraction setting. mechanism even though the lock for the subiactionsetting mec anism is released by mechanism.

Other features and advantages will hereinafter' appear.

v the accompanyingdrawings,

Figure 1 is a sectional side view ofan. Underwood-Hanson combinedtypewriting and computing machine, showing the principal parts necessarytounderstand my inventi'on.

2 is a. section through a one-way clutc forming part of the carry-overde- Fig. 3 is a perspective view illustrating the operation of thecarry-over devices;

Fig. 4 is a plan view of some of the pin bars used for computing, thesubtraction .har, and some other parts associated with them.

5 is a sidev ewof a P it Fig. 6 1s a sectionahfi'ont vmw' of pin bars,and part'of the pin-setting mechanism iorsaid bars.

Fig. 7 is a plan view of thecomputirg' mechanism taken mostly from apoint just .above the top of Fig.6.

' Fig. 8 is a perspectlve VIEW showing in skeleton some principal partsof the present invention, together with certaln related parts.

the computposition.

wheel's When the sub- 22 is a side view of the parts atjhe vFig. 9 is aside view of the computing wheels and certain adjacent parts, when add-In I v %ig. 10 is a similar view showing the parts when subtracting;

Fig. 11 is a similar View when set for tens-carrying in adding.

Fig. 12 is similar to Fig. 11 except the it is set for subtracting. Fis. 13, 14, 15 and 16 show the driving mem er of the carry-overdevices,-in succes- 'sive sections.

Fig. 17 is a perspective seen in Figs. 13 to 16. 1. Fi 18 is a frontview of a subtraction- Fig. 4 at a big or level.

ig. 20 is a sectional front view of part of Fig. 19. r i Fig. .21 is aview similar to Figs. 9, -10, 11 and 12, but showing the parts in normalFi com etion of a carry-over.

, Flg. 23 isa side view of the ing parts atithe beginning 0 ingoperation, when adding? ig. 24v a viewsirfiilar to Fig. 5, taken fromthe/opposite side, showing the relation of the parts in the pin-settingoperation. Fig. 25 is 'a skeleton perspective on a larger scale, of someof the parts seen in Fig. 8 but bringing out especially ,thesubtraction'controlled connections. Numerals keys 1 and alphabet keys 2operate through the usual key levers 3 and 4 to a tenscarryvibratetype-bars 5' upwardly and rearwardl so that they strike against thefront of a p aten 6 mounted on a'carriage 7 which travels on a rail 8,and is controlled by a j rack 9 meshing with a pinion 10, connectedprincipal movview of the parts I ig. 19 is a lan viewof the front part 1to an escapement wheel 11. Each type-bar has a heel 12 to engage auniversal bar-13 mounted on a. frame 14 which operates a rocker 15having the usual vibratory dogs 16, 17 to en ge said escapement wheel.11 and permit e'carriage to feed step by step unld pr the imp lse ofthe usual spring barre I The computing mechanism includes an indexmechanism comprising pins on which numerals are temporarily set up bythe nu-- meral keys. For thispurpose each numeral key 1 has a pendant 18to engage and depress the corres onding one of a series of rock arms 19ig. 6) which are arrayed across the machine, being mounted upon theforward ends-of rearwardly extending hori- 'zontal rock shafts 20 (Fig.7), forming parts of linkages which depress the index pins 27 on whichthe numerals are tem ora'rily set up. Toset the pins each rock aftcarries an upstanding arm 21 to engage a wrist 22 upon a horizontal link23 which extends step hystep; the bnrsQB are diep I wtirdly one afteranother to positions to *theirpins Withinfrange of the demammal-S126(Fig; 24), so that nnyhar pin on'the r. nv suitable means mnv be emloyed for displacing the fromeide to side of the machine. At

:BIldS each link connects with epuir of. hell "cranks EM (Fig. 6), thelong arms 25 of which are connected by linke'or depressor bin-e26 whiehicsoend to press downthe index pins 27.

lilnclrmimeral key determines the valueof the index pin thus set up,thenumeral to be computed, while the typewriter carriage 7 determines thedenomination by the bar on which the in mounted. .For this' beneath thelinks 26 and serve eventually to presently to be described.

Normally the index pins are set out of the (Fig 5), but, as the papercarr uec ad f I a, or-

26 may deprees its corresiondin forwardly displaced pin a inhe'rs orwnrdy one after enother, durmg the'niioveiment of the paper carriage butthere is ehown herein for t e sake o illustration, n, mechieia-nism forthis purpoemwhioh will hepreeently referred to.

Such. Index p1ns27 as are depreseed,

ject belowthe bars 28 on which the are carried, and serve as lugswhereby aai bars may be driven end-wise, forwardly, for turn,- ing thenumber wheels. 'I heyare driven by means of a universal driver'orgeneralop tel cross bar 29 which is brought forward once for every calculation.

The general operator in the Unclerwood- Hnnsmrcomhined adding andtypewritirg machine; comprises eide bare (Figs. 1 and which 'slide inguides on the shdewn-ys on the iran ework, nnd are rigidly united tofornia elide or carriage, said cross bar 29:

.lIiflIS 30 together. .Thieceriiege or moral operator they be driven H1tiny suitnb e mam er, as, for example, 1r crank 31 which ie fest upon atransverse horizontal rook e'liaft 32 journalccl at it's endsin theImme- "34, the latter meshing with formed upon the general operahnrs.The i'lltl'i'mi'lflflt of the crank or 28 in the decimal oystei'n rotatethe number wheels 38 in a manner path ofv movement of the depressor-burs26 7feednft I My helddby a' spring 41Fegninpt l. ato'pflhao, :that.theme thereof forms at ri ,6. mt if,

ingthe 111116143 from the cam pos tion e hown in Fig. '21 to the; p l

in -the direotiono "the erf orator which includes a transverse horiz'omfori'mngone of the CliEWlGQ'S for tying said into m;-sli with, the

55 work of th machine, end-carrying (Fig. 1) gments' 33 which ineeh withfioi -wurilly from the'l ig. 1 poeition causes is fixed to a number orcomputing wheel formin one of a. gang, there hem bar 28 or each numberwheel. 10

' ber 'wh ee1s are arranged below :1 opening 39 in the anal of themachine. The cross bar 29 w 'ich en: reeeedindex pin is placed some iMW. ehind saidins, so as to permit consider-"78f able lostmotion oi thefiner-a1 oporntorbe-f fore the first pin can 1 7 8 "1 crossbar andduring thisloetl motion the? racks 36 become meehedwith' tho numberwheel inion 3i". This result iselhmdin 80 the fa lowing manner: :Carriedupon the powerrshaft 32 and rotated thereby '13;

40' (Fige l, 8 and EM whioh, as soon Ill 9f crank 1 starts to turn, ana."

141 pivotedetd2 u'pon'an lmn not il -ti ever &5. Therideror pawl 41innormally y'whenthe cam diek "40 00;

row inthe-let'ter figure, the cam mrhea 6T- of the disk40, no t epawlflzridea'from the tion thereof; will 'When the lever isner, itwilldraw down a pnir o'f and 57, which are pivoted 0,17%. 011 thelotward end of the arm lififlnndthe lorwlir'd end of one arm of thelever 45'. The links M and 57 are connected'at their upper ondfi to fanarbor 4.9 onwhich'ull of the; n or mimber wheelie and the piniomlj Btherefor are. moimted. Alsomounted-on the or or 4:9 is n, ehifting frumeincluding side plates and 51'. i r,

It will thus beseen that whenthe cam 40 is' rotated to the position.shown inFig. :9, it will rock t he lever 45 end the parts connectedthereto which form n shifting frame, so that thepinione 37 will-*bedrawn down;

addition "racks B6 on the reek hers 3 a Hence as the general o rntoreontimm'to drive forward under t ie lim'puloe of the crank 31, theEinions erofjturned clockwise at Fig. 9 and e numberiwlieele aro'turnedin the some forward direction, thus performinn addition; each numberwheel beingadwinced. ,to an extent dependent upon which ,ofits indexpins 27 monomeric:

After-the crank 31 has been given:

forward stroke, it is ewun ...ba=ck-wardly 'rrormal position to restoret egfenernl open;

minor portion of thediak to the 1 mm on e m fromjthe axis 32 of the disk40 no I to p the lever 45. The; lever-.45 iaiixed longer as a strut, sothat the arm 43 tor to its normal position. At the initial portion ofthe return stroke of the crank 31 and its shaft 32, the rider or pawl 41turns counter-clockwise against the tension of the spring 41 owing tothe friction on the disk 40 turning in the reverse direction from thatindicated by the arrow in Fig. 9. This renders the rider 41 incapable ofacting any is permitted to approach the cam disk 40 under the tractionof springs'47 (Figs. 7, 19, 20 and 21), which now act to draw rearwardly\l-shaped or double cam levers or arms 47 pivoted at 47, which engagethe ends of said arbor 49 and'thereby centralize or raise the pinions37016811 to their normal positions.

- 1 This movement, which withdraws the pin ions 37 from the additionracks 36, takes place before the racks themselves start upon returnbeing preferpreviously carried the racks forward. The cross bar 29 forthis purpose engages (see Fig. 24).lugs-48 pendent from the rack bars inthe rear offthe cross bar 29, but the latter is arrangedjto'haveconsiderable idle rearward motion (enough to permit collapse of pawl 41)before engaging said lugs 48.

; At ,this point it may be noted that-the arbor 49 on which the numberwheels 38 and their pinions 37 are mounted, connects the two s1des'50-and 51 of a swingin frame bearings or'sockets at 52 to swing. uponcollars 53-carried by a transverse horizontal I rality of tie-rods 55."

= the bar 28.

connected tojthe general operator "Fig. 5, durin shaft '54; this shafthinged sipportfor said frame 50,51, and keeping e' compu wheels alwaysin proper relationship to t e shaft 54, which is and'carries certainprime moving tens carrying devices, as will presently be explained. Theside members 50, 51 are also connected .bya plu- Upon each of said indexpin bars 28 is carried not only an addition rack 36but also asubtraction rack 59 which is idle, as at an addition operation. Thisrack is paral el with the addition rack' 36.

but above the pinion 37 so as to rotate the same in-the oppositedirection, and is connected by an arm 60 with the forward end of Tocause the machine to. subtract at the is only necessary to move thecomputation pinions 37 into "mesh with .the 4 racks 59, instead of theaddition racks 36,

sothat the number wheels will be turned backwardly at the'ensuingforward drive of the index bars. 28.

rear of the machine.

I of the rack bars 36, at the same time restoring the parts '43 and 45play ,asecendcagn sleeve, which is pose of subtraction.

general operator,

will depress,

10, 11, 12 and 21), w ich has to forms spaclng disk 64 and an forming aconvenient.

45. ThelererA subtraction rocked in' one direction or ing to which disk40 or 64 is inaction. The

When the operator desires that they machine shall perform subtraction,he presses rearwardly a subtraction key 61 on'the forward end of a rodor bar 62, which extends from front to rear of themachine, and slides onsuitable supports 62 at the front and 7 Between its ends, this rodcarries a cam 63 (Figs. 4, 7 and. 25), which, during the backward thrustof the rod, engages the end of a sleeve63 and forces the same endwisealong the shaft 32 against the tension of a spring 63. The.

sleeve63 carries the cam disk 40-with it so that the latter is displacedsidewise relatively to the pawl 41, thereby interrupting the cooperationtherebetween and preventingthe rocking of the-lever 45 by the .cam

disk40. At the same'time' is brought into disk 64 also fast to saideffective only for the pur- This disk 64 is arranged to' coiiperatewitha follower or pawl 65, which is out of line with the pawl ll, that is,ferent plane sc /as not to be in action saine time. The I same plane asits pawl 65 when the cam disk. 40 is shifted out of engagement with teepawl 41. Y During the ensuing forward stroke of the the cam disk 40 willrotate idly; but the cam disk 64, as seen at Fig. '10, by means of thecam surface 68 which connects the minor circumference of the disk withthe major circumference thereof, the follower or pawl 65, which isnormally held by a spring 65 against a stop strut between the cam arm 74rigid with the lever 5, the shaft 44 and the arm berocked so as to.force upat the .56 will thus wardly the links 46 and H57, therebylifting the frame 49,56, 51, 55, and carrying the pinions 37 inio meshwith the subtraction racks 59, so that the latter are enabled to turnthe number wheels. backwardly during disk 64 is shifted into the 5.

it works in a difthe remainder of the forward stroke of the 2 generaloperator. On the return stroke, the

pawl 65 will tilt against thetension of the spring 65 to a receded.position, releasing, t

e arm 74, so that the V-cam arms 47 will force the number wheels andtheir pinions 37 clear of the racks 59.

It will thus be seen that the springs 41 and 65 normally hold the pawlsor riders. 41 and 65 in a position to engage their respective disks 40and 64, so that as one or the other rides from the lower circumferenceto the higher circumference by way of the cam 67 or 68, the bell crank45 will be the other accord pinions 37 will, then be brought intoengagement with the addition racks 36 or the sub- 1} traetion reeks 59to rhtete the computing wheels in ,e

' 15 'tion or enhtriiiction 11' eetive y. The mnnti "citation. ofeitherof .he enm disks 4:0 or 1 ilte ite pewl or rider 41 or 65, 50 thatthe" eotive to Space 511.1116 ineff arrow to Whioh it is connected. fromthe reep tire ealn disk.- The1*efr.ire,-injepiteof he fact'thnt thesurfacehirthest from the enter of tlna elmft 32 ie in. notion, theoceordilnt arm 43 or 74, which has just been roeked to bring about anengagement of the p'niion e 37 with one of the rate "36 or 59,

The permitted to approach lrer to the er offthe sl'inft 32 under thetraction of sprin' in but also is 4,3'anl1 74 iositlon such 11 t Hoi'inect (l thereto oe ii':inil-po the lever 4th and the ith the rhino.ct'lve hm c ectioii, w

' 'tohringhhout an mldit M1 or n. snht c ation between the pinii' 15457111111 the racks 36o'r i The co n nlislo m,

.hnt is t) .11 on t hz'iiii 2 by:

" 3 m an arin T fixmil 1 t'h rough, in hole Elimiil wi i ich other.

. .ft i has nleo esecvf enhtracting can '0 16) for ,horr' 'ing .1 "ion.Theeame mti've in their forwardor a. backward clirec- 4.7, which. notonlydrew the is 37 endthe 'linl or comp tlng wheele nent rotation of thex 79 but brought up into mes much as both. (,lielxa. ere

end il -i v detent I32 (Fig. 7) preventhackward ll rotation of theshaftM. I

Enel'x.mnnherfwheel (except that of lowest clenol'l'miatlon) has anindividual tram of mechanism for. connecting it to this powerclrivenlens-cor ymg shaft 54, tohe driven therefrom. The train, l'iowever, isnormally lmuken, and hence the tappets or camei'o,

are all normally inefi'ectijve. .Eeehnumher wheel 38 (except that ofhighest (lemmiinetion) has a starting tooth 77, the fitlnetion ofwhiehie toesthblieh a connection froln the number Wl'ieelof next hi herdenornirmtion to thetene-carrying s aft 54, when it is necessary tocarry 1 tool borrow 1 from the next higher wheel. Each of the trains ofconnecting devices ii'nizlucles (Fig. 3) a pawl 78 to mesh with a gear79 fixed. u aonihen r mber wheel 33 the pew] preferalily havingmnltiplefteeth 80, or being in the fornrof a. hhort rack, as to engageand operate the gear 79 when moving from an offset position at eitherside to n mid-position. Each rack or pawl 7'8 is nornmlly out of meshwith its gear Wheel therewith in timeon the return stroke of the.generalv operator during thejeerry-over operation. Each melt or pawl 78is also normally in a neutral nonrdriving 1'nid- ;)ositi0n','hut thestarting tooth of each eomputihg wheel on (.(Hl'lplPtillg'1 cyelecorresponding toithe ex (hung value between it and the next higherconmilting wheel, shifts its pawl to'one side or the other for 'asubsequent dr ve in, one

direction or the other. according to whether l ie'to he carried orborrowed.

To tl end, the pawl 78 has a pin-and-z e'lot: co neetion. at 81 with. adouble hell crank: lever, tumbler or; rocker, S5, 93, which 19; in themitnre of an mterponent device heand t nox'nher wheel rotating pawl 78.lever he" ii lower arm and. an upper 93 and. pivoteclibetween its endsupon rhor It also has a short arm 83 pro 'v' (i wi 1. pin. 84 in thepath of saidstarb ing or eetting tooth 77 to he swung in. one

Wheel, 38, engages and depresses the I)... together with the arm 83,swinging Jponent-lever or rot n at Figs. fiend 23. ltjiwejror'n' 85 oisa'iri leveror r v'ker. )t to engage with the in 81. m the giollhc Fig.'11 )osiition is the completion of: a full joycle of Shirl 12.0

'erto the IJOSIF- he normetpoeituan ntF'ig.

10.5 ti-veel'i the power-driven tens-carrying cams swung into the pathof the associated adding T 85 is a cam-liLe'tooth. 86

9. Upon said arm is seen. as having been which at 1.

tappet 7 on the tens-carrying shaft 54., the function of the latterbeing to act u on said tooth 86, and thereby return the rec er forwardtoits normal'position. During such return movement, the rocker arm 85carries the gear with it the pawl 78, which, however, has. in themeantime been swung up into mesh wi I 79 of the number wheel next higher1 than that which carries the setting tooth 77,

ifts the forward and 51 formin permits the shi ing of the gears 37 andthe tens-carrying mechanism about the shaft 54 as a ivot- The forwardspringing of the pawl 8 is effected in this instance by the engagementof the tappet 75 with the rocker Di/i186.

' B means of said pawl 78, the higher num r wheel is advanced one pointby the r so time the rocker 85, 93 reaches its mid-position shown atFig. 22. The cam 87 has a continuation or dwell portion 90 (Figs. 22 and23), which holds down the rear end of the pawl 78 during thewheel-driving movement, and which at the end of the driving 7 movementreleases said pawl and permits the forward end thereof to be snappeddown that the tappet95 camming or acting is to difi'er'ent planesfromthe em tooth 9-} is correspondingly oiiset from the 60..

by a. spring 91 (Fig. 9) out of mesh with the gear 79; a spring helddetent 92 engaging the latter to hold the number whee in position:

At the snbtracting operation, which .ineludes what may, be calledtens-borrowin the setting tooth 77 on the number whee which is travelingcounter-clockwise (Fig. 10) lifts the arm 83 and swings the rocker 85,93 to the Figi- 12 position so as to carry the lower end forward andbring the awl or rack 78 to an advanced position readiy to engage thepinion 79 and effect a backward movement thereof.

The upper arm 93 of the rocker has tooth 94 which 'at this time is swungin t% thepath of the subtraction cam or tap 95 on the assistingshaft 54;the tappets 95 being spirally arranged and being paired with thetappcts..75-. The ta pets 95 are is 75, and the '96 of the awl 78 andelevates the front end thereo into mesh with \thegcar 79,

a 0 94s in swingingjthe ,uocke'if' 93;.

the tooth I from the side plates l $0.

of the three positions.

.ifihwel arm 93. The cam 87 depress bs the rear end migSifiSE 93. 1 5 6fhe normal, midway. position at,

an... i

pinging wheel 38. ht the conclusion of the tens rowing operation, thecam 87 releases-the rear end9fi-of the pawl, and the forward.

end of the "latter is drawn down by the spin 91 as before.

tappets and 95,

groups, as seen at Fig. 17 are arrange spirally on the shaft 54, putingwheels are successively operated by 'draws'thpawl 'rs backwardlyiant-tat. j 1 step reverse movement to the associated com- 'Eac cam 87',together with its-associatgdy forms agroup, and sad;-

ii." so that the comthe carry-over devices from lowerto higherdenominations.

It will be seen that be re rdedflas a tumbler or interponent since itenables the pawl 78 to be operated the rocker s5, 93 ma y by the tappets7 5, 95 on the power shaft 54;

and. .that the operation of said rocker, as effected by thetappets,,resembles the operatio plpf allet in an es'ea'pe'ment mahamsm;

0 rue or or tumbler 85, 98 ish inany- V of its three positions (Figs. 9,11 and}? means of a pawl 97 pivoted upon are which rod connect! the sidelates 50, 151 just infront of the rod 55, andsaid pa'ql is premeddownwerdly'by a spring 99 coiledaround the rod 55;the paw having three"notches I w 103 on the tumbler tohold the same'inaany It will be seenthat the sidesof the notches 100 and 102 are extended to form hooksvwhich positively stop the rocker 85,: 93 at each 0 its extremepositions;althou'gh, if

desired this rocker 85', 93 may be positively by the engagement ofeither tooth arrested 86o!- 94 with the circular hub portions 103" ofthe disks on which the cams ortappets 75 and'95 are formed, Fi 16 and22.

It will be understood t iia speed with which the power-drivente'nscarrying shaft 54 revolves, the tappet 75 is apt' to. operatev thetens-carrying rocker 85,

93 at such speed, in swinging it to the norm1 position seen at Fi 22,that the rocker.

they'number wheel with the pawl 78 an might overthrow. /To guard againstthis,

there are provided on theehaft 54, stops 95" I concentric with saidshaftand merging into ,or being continuations of thetappets 95. These stops95 are so placed that each occupies the path of, the tooth 94 on theassociated rocker 85, 93, when the latter is swung t e tappet 75 fromthe Fig. 23 position to normal gnition at Figs. 21 and 22. ()f s aft 54isrevolving, and it 100', 1.01 and 102 .toengagea'ipin;

t, owing to the no v for a brief period that the stop or ion 95};remains in the path of th, shoulder or projection 94'; but this issuflicient' to prcvent'overthrow of the is? Preveiited I operationwing-tens in a similarjmanner. At.

( r 8 9 is hdwn a ro ked oyer to begin a subtraction operation; and

' throw of the rocker 85 at the subtraction or tens'borrowingoperation,- the stop or dwell 95' being suliiciently long for this poee. That is to say, the outer margins or gw'ell portions of each pairof tappets and for eucl'r of the dial or'computing' .w'heele '38 arearranged with respect to each other that as one of these tappets engages; its associated tooth 86, he on the rocker or into orient 85, '93to swing said rocker to emit. -positi .)n, the dwell portion of theother tap pet will come into the patl'i 250 86 according to wl'iichtappet is in action, so as to prevent an excessive nu'wcl'nent oftherockcr 35, 93 beyond the n'1id--pi')sition ehownin Fig122.

The number wheels have individi'lal tenscarrying trninseach comj'n'isingthe tumbler 'Bbf'fil, the me 97, the tappet 75 95, the

pttiwl 78 am the gear 79. It W11 1. be Ul'llIIl GI "that all of thesetens-carrying trains 10 are mounted upon the swinging frame 50, 1" '51,and, therefore, that the nlilmljier wheels with their pinions, detents92, gears, and

Mme-carrying trains swing up and down as a unit almnt said powershatt5-2}, which a *eupymrt for the rear end. of said frnine alreadyexplained. Owing to the ,iuctthat them members swing up and down we aunit, the carry-(Nor mechanism includin}: the setting tl'jroth- 77 iscnablcd'to per- 401mm its functions properly whether the wheels are inthe addition positionas at Fig. 11. or in the subtraction. position asat Fig, 12, i

The reason for arranging the tappets 7 (and tappete 95) in spiralrelation around the anti-sting shaft 54, that this enables tens :tobecarried upon the number wheels so that "the machine is capable ofcarrying 1 over 'from wheel to wheel '0 throughout the entire set at thetens-carry ing operation; the operation of one tenscarrying trainbeingfinished before the 0pera't'ion of next higher train can begin. Thepawls 78 maybe guided at theiri-ear zin'ia comb 104', and any suitableprovision may be made for guiding their forward ends, asflfqr instance;said forward ends may be 'confinedbetwoeu the racks 36 andhthe dialWheels '38. N

The subtraction rod (Sills held back durin itheelibtmction operation bymeans of i a latch L105 (Figs. 1, 84 and 25), which riveted lfll'l-tuponthe framework and is rlileldby e spring 107 in, a notch -10 inthe latchis automatically of movement of its accordant tooth 94 or 111.8 toengage a notch 1119 in 'the rod a it wouldbe set up. It is hence net ingrack bars 28 be displaced individr' meral key and correspon I .natlonalcolumn in which the released at the conclusion of the operation of thetens -borrowin over meehal'lism has been compfiated. This.latch-releasing operation occurs simultaneously with. theraising of auniversal plate 108, which restores thein-dex pins 27 to nor. malpositions. The pin restoring plate 108 operated in the; usual nipnner,and is pin oted as usual upon bell, cranks 109 connected by a link 110.i v

During the last part of thereturn stroke.

""of the general operator, a pawl or-abutment 111 on one of the sidebarsm i' suelly en'- gages an arm 112 rigidly connected to an iii-T11 112 tocause the" latter "to "swing upnrardly and thus raise the plate 108,thereby l fting the index pins 27f Thereupon the arm 112 trips oil fromthe abutment 111 and the plate 108drope.v H 85 During, the risevof thelate 108, an e'rm'" 11.3 connected to one ofsald bell cranks 1091,siirings down and strikes a heel 114 on ty '1 \qj latch. 105, thuswithdrawing the same from" the notch 107" in the subtractionfrod or bar;(39 so that a spring 115 (Fig. 7) may snap? the latter forwardly tonormal position, as seen at Fig. l. I a

It will be seen that the arm 118 is fixed upon a rock shaft 11611 ,on.which one of P5 the bellcranks 109-is fixer; If it be desired to retainthe key 61in its rearward position, a bolt 11? 18 and: 19) may be slidtothe leftvby means of a fingeriece" lilo spring detent 120 holding thebolt in eitherposition. y

The index pin bars 28 they be guided at their forwardende in a comb 121(El 1') extending between. side plates 121 6? the computing head. Thebars 28 may be-confined between said. comb 1221 and a rod 122 extendingacross the tops of the pin bars 28. At their rear ends the bars may begifiidedin a fixed con'1bv123.

It has been stated above that the pin bars 28 are nori'l'lallyltmated-in such apposition that the pins 27 thereon are' not sposeddirectly below thei iwin-setting bars 26 but offset to a positionliietween the same, so that if the numeral. keys were depr (1 no pinscarriage moves step by step in mg direction to com into dilfcrentdentin:national or dig t col inns that the .in bcar- 1 iv and in sutnession tocorrespond with the denominatio'nal colun'm at the printing point,

and to bring the pins 27 on the properpm bars 28 directly subjacent thepin bars 26, so tbat'when a numeral k I actuated, the pin correspondingto the numg to the (lflllOInlr number planted, w ll beset c athe-movement of the typewriter carriage.

For I displacing the index pin "bars 28" preparatory to setting the plusthereon, there are provided upon the typewriter carriage one or moredogs 124 (Figs. 1 and 8).

These dogs are herein shown as adjustable Inasmuch as the carriage 7feeds from right to left, each dog 124 operates a series of denominationselecting levers 128 individually and seriatim, beginning with the [onefarthest to the right and advancing to the one farthest to theleft;Inasmuch as,-

however, when the computing head comprising the .wheels 38 startswith-the computing wheel of highest denomination at the left andproceeds sewkitim to the computing wheel of lowest denomination at theright, the order of operation of the rack bars 128, which cooperate withthe computing wheels must be the reverse of the order of operation ofthe dogs 124 on the denomination selecting levers 128.

To enable this reversion of order to be brought about, the denominationlevers 128 are pivoted intermediate their ends on a pivotrod 129, andthe levers are so formed thatjthelever, which has its upper end at theright, has its lower end at the left, and vice versa,";and similarly forthe intermediate levers. To obtain this result each lever 128, compriseean upper portion 130 extending above the pivot 129, and a lowerportion'131 connected thereto by a bail, said bails formink'g'a nestsuch that the outside bailconhiacts the upper left-hand lever 130withthe ld wer right-hand lever 131. The

next innerbhil connects the adjoining upper lever to tht adjoining lowerlever -and so .on; the central'lever .128 having no bail because theupper and lower parts of said lever form a straight line. The lower ends131 of the levers abut against the rear ends of the pin bals 28, withthe-result that when the upper end of any lever 12 8 is forcedrearwardly by the typewriter carriage, the lower end'of that lever willshift its pin bar 28 from the position seen in Figs. 1 and where thepins- 27 are out of range of the pin-setting linkages 26, to theposition seen in Fig. 24, where the link operated by the numeral key 1is setting the corresponding pin.

The pin bars 28 are guided and supported in a comb 123 and their lugs 48prevent them from having excessive forward movement by.-abutting againstthe cross-bar 29 of the general operator. Each index pin bar 28 isprovided witha return 'means in of the cross frame supporting thepin'setr ting linkages; each pawl having a return spring 145 whichcauses thepawl to bear against a shoulder 146 on the bar 28, said'shoulder inclining to the rear and formed to'permit the pawl 143 torotate idly upon the top edge of the rear portion of its bar 28, duringthe driving forward movement of the latter; these awls 143 serving,however, to return the ars 28 promptly from the position seen at Fig. 24to the normal Fig. 1 position.

In addition to the key 61 whereby the bar 62 may be set for subtraction,means are also provided whereby the machine will automatically subtractin certain computirag zones or columns, and. again return to a ditionafter it has passed each subtraction zone or column. To bring about thissame distance as the lower ends of sail levers 128. Thissubtraction-setting lever 151, to control the subtraction setting, isjoined by 'link 152 and a rock arm 153 to a rock shaft 154, said shaftcarrying fast r thereon a dog 155 which controls the sub: tractionsetting. Whenever the subtraction dog 150 cams the lever 151 rearwardly,it lifts the dog 155 out of the notch 156 by which it normally. holdsthe slide 155 connected to the subtraction bar 62, thereby permittingsaid slide to be drawn rearwardly by a spring 157, with the result thatsaid slide draws the subtraction bar 62 to effective position by meansof a pin-andslot connection at 158, said connection adapted to allow thesubtraction bar 62 to be set independently of the dog 155. When thesubtraction bar is set by the dog 150 it is elfeetive on the computingmechanism in the same way as when set manually.

-lVith the operation of the general operator, said subtraction bar isrestored pre cisely as if subtraction had been manually set. It is to benoted at this point that the spring 157 is much stronger than the springwhich returns the subtraction In order to re-tension the spring 157 andprevent its interference with the spring 1.15 In returning themechanism: to its adding position, the crossbar 29 of the general operator, just before the end of its forward movement-,catches a lug 159fast on the slide 155 and draws said slide forwardito position where thedog .155 will be drawn by a spring 1 160 into the notch 156 by which thedog 155 usually holds said slide, and so reset the automatic subtractiondevice to itsnormal position. The spring 160, it will be noted, bothnormally draws the dog 155 to effective posi- 5 'tion against the slide155*, and also holds the subtraction lever 151 in position where it willbe struck by the subtraction .dog 150 in the letter-feeding movement01".the cart will be noted that said subtraction dog 150 is identicalwith the dogs 12%, except that said dog has a broader cam face 161, sothat the lower end. of said cam face cooperates "with a cam-faced lug162 on thelever 1.51, said lug being placed below the lugs on the levers128, with the result that said lug stands clear of theordinary dogs 124.In order that said dogs may not interfere with the return of hetypewriter carriage, they are provided with swinging mrmihers 163 ofwhich the cam :l'aces form a part, and said swinging members are normaly held in ct fective position by Springs 163 which pei mit the swingingmembers to be sw ung: to in effective position by the cams on the levers128 and-ltihduring the return movement 01': the typewriter carriage.

For the purpose of correcting errors, the machine is provided with anerror key 164; {Wwhi'chis adapted to erase any number set up n the pinbars 28 by restoring the pins set ug to normal position. For thispurpose, -"sa1-f;.key, when depressed, carries down, by neans ofapinlfifi, the forward end of a 86*{l'even166 which is pivoted at 167,so that i the rear end 168 thereof will strike a ing- 169 projectingfrom'one of the bell cranks 109 .'n such a way as to raise thepin-restoring late 108x00 restoring position, thus unset- "40 ting everyset pin.

If the general operator is not actuated, thisaction will not, however,disturb the an tomatically-acting subtraction-setting mechanism. On theother hand, if the machine ,45 has been set for subtraction by hand,that "is, by the rearward thrusting of the subtracl tion'key 62 thedepressionof the zero key to correct an error will restore the machine.

, to' an adding condition. It will be remembered that the subtractionkey rod. 62, when pressed rearwardlmis caught by the latch 105engagingj-inthenotch 107. Now, inasnru'clige'us"the error key 164actuates thepirr H restoring i late-1'08, the arm 113 connected tthertowi lQbe rockedatthis time; The arm 7 IYK-WiII-QngagethG heel 114 on thelatch 105, t .311 1w l be free to. restore the subtractionent re key but2 a d the p @Pemted eb'y I to {their normal dormant lpositions. Itewidciiit then that theerror .key, while it-fwill not: restore thecomputing mechanism lto im adding conditionwhen actuated after "aneutomatic subtr' omen-sett ng, will reerebyi'releasmg the same, so thatthe-spring piece for restoring said .computinfg condition if the samehas been set for subtraction i'nanually.

In caseof manual setting for subtraction instead of an automaticsetting, the sub-.

traction setting mechanism can still. be held. in its actuated positionby the special bolt or look 117, so that a restoration from subtractionwill not be made at the actuation of the error key even though thelatter, through its train of connection, releases the latch 105.

Variations may be resorted to within the scope of the in ention, andportions of the improvements'n'iay be used without'others.

Having thus described my", invention -d: claim: y l. The combinationWheels, of a series of rack bars for driving dial wheel's, a travelingcarriage, a tappet carried by" said carriage, a se ries of leversmounted on a fixed pivot ar ranged to be cammed. rearwardly by said tapiiet, to force forwardly by direct engagement, said rack bars toeifect'de- 'nominatioual selections, and subtractionseo ting mechanismincluding a trip and a lever for operating; said trip, mounted on thesame fixed pivot as said denomiriation-selecting levers, and operablefrom said carriage by a tappet cairied by said carriage.

2. The combination with computingmech' anism, of subtractionsettingmechanism for said computing meel'ianism, indexing mechanism,errorco'rrectlng, mechanism for said lndexing mechanism, (lLtVlOBS,operated 'by,

said error-correcting mechanism to cause said SllblZIQOtIOIl-Sfilltlllgmcchanlsrn to -be restored from set to unset position; and means forpreventing at times the'restome tion of said subtractionsettingmechanism when the error-correcting mechanism is op' erated, so thatsaid computing mechanism may remain in subtraction condition afteractuation of the error-correcting mechanism.

The combination with computing mechanism, .of subtraction settingmechanism fir said computing mechanism, a general ope tor for saidcomputing mechanism, errorcorrecting mechanism connected to causerestoration from a subtraction setting by said subtraction settingmechanism, and means with series of dialoperated by. the generaloperator, forcontrolling the action of the error-correctingmechanism onthe restoring mechanism for .the

subtraction setting mechanism. F

4. The combination with computing-mach:

anism, of subtraction setting mechamsmkfor ing mestnsior saidsubtraction settin said computing mechanism, manual-opeuatmen anism,automat c operating means:v or said.

subtraction settingmechamsm, and a fin rp d 111 a. nism froinasubtraction sett ng, so

tuetion'ofone oi said means.

ely-when the; latter has been'brought into play by-air; u

to'normal unset ,been brought into play, i the action'of said spring,error-correcting said computing mechanism,

5. The combinatiorrw th computing mechanism, of subtraction settingmechanism for manual operat mg means for said subtraction settingmechanism, automatic operating means for said subtraction settingmechanism, a finger piece for restoring said computing mechanism from asubtraction setting, solely When the latter has been brought into playby actuation of one of said means, and a general op erator connected torestore from a subtraction setting, when said subtraction settingmechanism has been brought into play by the other of said means.

6; The combination with indexing devices, of subtraction settingmechanismior said indexing devices, a spring tending to restore "saidsubtraction setting mechanism to normal unset position after having oncebeen brought into play, a lock preventing the action of said spring,error-correcting mechanism for said indexing devices connected torelease said 100]: to permit the action of said spring, and a secondarylock preventin an action of said spring even when saidfirstmentionedlock is released by an actuation of saiderror-correctingmechanism. i

7. The combination with indexing devices, of subtraction settingmechanism for said indexing devices, 'a spring tending to restore saidsubtraction setting mechanism position after having once alockpreventing mechanism for said indexing devices connected to releaseSBJd lock to permit the action of said springgand a second springstronger than said first-mentioned spring capable of bringing saidsubtraction set ting mechanism into play, and overcoming the restoringtendency of said first-mentioned spring to restore said subtractionsetting mechanism even When said lock is released by saiderror-correcting mechanism.

8. In a combined typewriting and computing machine, the combination withtype- Writer numeral keys and a traveling carriage, of a series ofcomputing Wheels, a de nomination-selector carried by said carriage forselecting said Wheels, a general operator for simultaneously carryinginto all said wheels the digits written by said keys in a computingzone, devices on Whichnumbers are temporarily set up by said keys toper-- mit the digits to be so can? means for erasing the set-up number,SllbtlzlCiiOI1-S-tting means for causing the set-up number to be carriedin said Wheels subtractively, a dc vice automatically made effective bythe carriage on entering said zone, for making the subtraction-settingmeans effective, the connections being such that the subtraction-settingremains effective until the'operation of said general operator, a manualsubtractionsettingdev-ice, and connections whereby the erasing means iseffective to both erase a number and erase the manualsubtractionsetting, but is inefiective on the automaticsubtraction-setting.

HANS HANSON. Witnesses W. 0., Wnsrrrmn, J ULros DUoKsTINn

